The heart leaf of sharp pepper shrinks

At present, the temperature is gradually decreasing, and sometimes there is heavy fog, resulting in frequent diseases of sharp pepper planted in the shed. Recently, vegetable farmers often report the problems encountered in growing sharp peppers. The recent problems with sharp peppers are sorted out as follows for vegetable farmers' reference:

The heart leaf of sharp pepper shrinks

Shouguang City five Taiwan a vegetable farmer called to inquire, the planting of sharp pepper heart leaves dry shrinkage phenomenon, asked whether there is a virus disease?

Dry shrinkage occurs in the heart leaves of sharp pepper, which may be the occurrence of virus disease. After the pepper is infected with the virus, there can be a variety of symptoms, such as mosaic, fern leaves, bright veins, dwarfing, yellowing, necrosis, top withering, etc., among which the fern leaf virus disease can cause the heart leaves of sharp pepper to shrink. After the occurrence of this virus disease, the diseased plant showed varying degrees of whole-plant wrinkling and dwarfing symptoms and increased branches, showing clump-like, heart mesophyll tissue degeneration, smaller leaves or fern leaves, and distorted in the later stage of the diseased plant. If the symptoms of sharp pepper are similar to the above, and it is likely to be caused by virus disease, the prevention and treatment can be carried out in accordance with the following methods: ① 20% virus A wettable powder 500x solution; ② virus net or virulent 500x solution; ③ 1.5% phytoling emulsion 1000 times solution; ④ antiviral agent 1400x solution, sprayed every 10 days, three times in a row.

Drug damage causes new leaf wrinkle: mite damage may also cause heart leaf dry shrinkage, the specific symptom is sharp pepper leaf thick green, thickening, brittle phenomenon, the back of the leaf is bright and shiny, when the mite damage is serious, it will cause leaf curl. The activity of mites can be clearly seen under a high power magnifying glass or microscope. For the damage of mites, it can be sprayed with damaging mites, avermectin, Aifuding No. 1 and other chemicals to control.

In addition to the above two reasons, Mr. Liu Mingjie, the chief expert of Shouguang vegetable Association, also put forward the following point of view: drug damage may also cause shrinking heart leaves of sharp pepper.

There are two kinds of drug damage, one is hormone poisoning caused by improper concentration of hormone, and the other is the direct drug damage caused by excessive concentration when spraying. The occurrence of hormone poisoning mainly occurs on the young heart leaves near the growth point, the veins of the leaves are turned and twisted, the leaves are thick and stiff, the color becomes dark, and the leaf margin is rolled up. Curling leaves, hardening, black and green and other phenomena appear near the flowers and fruits.

According to teacher Liu, most of the above phenomena are caused by spraying too many hormones. The dry shrinkage and curl deformity of the leaves near the growth point is due to the poisoning caused by the excessive accumulation of hormones at the top of the plant. In order to avoid dry shrinkage of heart leaves caused by hormones, the concentration of hormones should be strictly controlled. Try not to use preparations containing hormones. If the sharp pepper appears the phenomenon of prosperous growth, you can spray Fengshou No. 1 800 to control, the drug has no hormone, you can rest assured to use.

Another kind of drug damage is the drug damage directly produced during spraying. Usually vegetable farmers use metalaxyl manganese zinc, Kelu, mancozeb and other chemicals to prevent and control diseases. Long-term use of manganese and zinc chemicals are likely to cause drug damage. Now vegetable farmers are afraid that the disease will not be cured after the occurrence of a serious disease. once there is a slight occurrence of the disease, use strong medicine to control it immediately, the lower old leaves may still be able to bear, and the upper young leaves are very likely to cause drug damage, causing heart leaves to dry up. After the occurrence of drug damage, we can spray Fengshou No. 1 800 times or love more harvest to alleviate, so as to avoid plant growth affected by drug damage.

There are sporadic occurrence of pepper virus disease.

When the author visited Shouguang City, Shouguang City, a vegetable farmer was holding two round peppers and asked what kind of disease it was. The diseased pepper was covered with brown stripes, and there was no change in the pulp after the dissection. It is understood that the leaves of pepper plants with stripes do not have any adverse symptoms, but there are brown stripes or yellowish brown spots on the fruit, which has been diagnosed by vegetable experts from the vegetable Association, which is pepper stripe virus disease. Commonly known as Huang Zaozi, the current is the period of the occurrence of such diseases, we should pay attention to the prevention and control of virus diseases, and strive to minimize losses. Viral diseases are spread mainly through the infection of worms or wounds caused by friction.